Masco Corporation
US ˙ NYSE ˙ US5745991068

SecurityMAS / Masco Corporation
InstitutionAsset Management One Co., Ltd.
Latest Disclosed Ownership82,524 shares
Latest Disclosed Value $ 4,981,974
Asset Management One Co., Ltd. reports 3.64% decrease in ownership of MAS / Masco Corporation

On May 8, 2026 - Asset Management One Co., Ltd. filed a 13F-HR form disclosing ownership of 82,524 shares of Masco Corporation (US:MAS) valued at $4,981,974 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 85,641 shares of Masco Corporation. This represents a change in shares of -3.64% during the quarter. The current value of the position is $5,740,369 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-08 2026-03-31 13F MASCO COM 574599106 82,524 -3,117 -3.64 4,982 -9.93 0.0147
2026-01-27 2025-12-31 13F MASCO COM 574599106 85,641 598 0.70 5,531 -7.62 0.0154
2025-10-22 2025-09-30 13F MASCO COM 574599106 85,043 -522 -0.61 5,986 8.72 0.0173
2025-07-31 2025-06-30 13F MASCO COM 574599106 85,565 -566 -0.66 5,507 -8.06 0.0173
2025-04-23 2025-03-31 13F MASCO COM 574599106 86,131 8,508 10.96 5,990 5.38 0.0207
2025-01-30 2024-12-31 13F MASCO COM 574599106 77,623 -1,469 -1.86 5,684 -14.39 0.0195
2024-10-30 2024-09-30 13F MASCO COM 574599106 79,092 -881 -1.10 6,639 24.52 0.0236
2024-07-18 2024-06-30 13F MASCO COM 574599106 79,973 -15,599 -16.32 5,332 -29.28 0.0204
2024-05-02 2024-03-31 13F MASCO COM 574599106 95,572 10,477 12.31 7,539 31.90 0.0291
2024-01-24 2023-12-31 13F MASCO COM 574599106 85,095 -4,307 -4.82 5,716 19.61 0.0230
2023-10-19 2023-09-30 13F MASCO COM 574599106 89,402 4,702 5.55 4,779 -1.69 0.0213
2023-07-31 2023-06-30 13F MASCO COM 574599106 84,700 -5,978 -6.59 4,860 7.81 0.0206
2023-04-25 2023-03-31 13F MASCO COM 574599106 90,678 2,193 2.48 4,509 7.92 0.0204
2023-02-06 2022-12-31 13F MASCO COM 574599106 88,485 -10,918 -10.98 4,177 -10.00 0.0204
2022-11-04 2022-09-30 13F MASCO COM 574599106 99,403 3,190 3.32 4,641 -4.66 0.0236
2022-07-29 2022-06-30 13F MASCO COM 574599106 96,213 -2,396 -2.43 4,868 -3.20 0.0229
2022-05-13 2022-03-31 13F MASCO COM 574599106 98,609 -8,523 -7.96 5,029 -33.15 0.0196
2022-02-09 2021-12-31 13F MASCO COM 574599106 107,132 -932 -0.86 7,523 25.32 0.0262
2021-11-02 2021-09-30 13F MASCO COM 574599106 108,064 -8,617 -7.39 6,003 -12.65 0.0230
2021-08-03 2021-06-30 13F MASCO COM 574599106 116,681 -5,165 -4.24 6,872 -5.84 0.0256
2021-05-14 2021-03-31 13F MASCO COM 574599106 121,846 -18,926 -13.44 7,298 -5.15 0.0290
2021-02-12 2020-12-31 13F MASCO COM 574599106 140,772 -9,026 -6.03 7,694 -6.84 0.0317
2020-11-13 2020-09-30 13F MASCO COM 574599106 149,798 -1,906 -1.26 8,259 8.41 0.0380
2020-08-14 2020-06-30 13F MASCO COM 574599106 151,704 -781 -0.51 7,618 44.55 0.0375
2020-05-14 2020-03-31 13F MASCO COM 574599106 152,485 -4,238 -2.70 5,270 -29.93 0.0308
2020-02-14 2019-12-31 13F MASCO COM 574599106 156,723 -4,864 -3.01 7,521 11.65 0.0339
2019-11-14 2019-09-30 13F MASCO COM 574599106 161,587 -5,957 -3.56 6,736 2.48 0.0324
2019-08-14 2019-06-30 13F MASCO COM 574599106 167,544 -11,014 -6.17 6,573 -6.35 0.0323
2019-05-15 2019-03-31 13F MASCO COM 574599106 178,558 -347,931 -66.09 7,019 -54.39 0.0380
2019-02-13 2018-12-31 13F MASCO COM 574599106 526,489 -7,083 -1.33 15,389 -21.30 0.0367
2018-11-14 2018-09-30 13F MASCO COM 574599106 533,572 7,291 1.39 19,554 -0.67 0.0401
2018-08-14 2018-06-30 13F MASCO COM 574599106 526,281 4,764 0.91 19,686 -6.66 0.0430
2018-05-14 2018-03-31 13F MASCO COM 574599106 521,517 211 0.04 21,090 -7.95 0.0475
2018-02-14 2017-12-31 13F MASCO COM 574599106 521,306 -1,609 -0.31 22,911 12.34 0.0505
2017-11-14 2017-09-30 13F MASCO COM 574599106 522,915 -1,104 -0.21 20,394 1.88 0.0479
2017-08-14 2017-06-30 13F MASCO COM 574599106 524,019 -9,299 -1.74 20,018 10.46 0.0511
2017-05-11 2017-03-31 13F MASCO COM 574599106 533,318 -60,375 -10.17 18,123 -3.51 0.0476
2017-05-02 2016-12-31 13F/A-1 MASCO COM 574599106 593,693 546,117 1,147.88 18,783 1,053.04 0.0480
2017-02-13 2016-12-31 13F MASCO COM 574599106 593,693 18,783
2016-11-07 2016-09-30 13F MASCO Com 574599106 47,576 16,618 53.68 1,629 72.20 0.0242
2016-08-03 2016-06-30 13F MASCO Com 574599106 30,958 -13,107 -29.74 946 -31.94 0.0142
2016-05-05 2016-03-31 13F MASCO Com 574599106 44,065 402 0.92 1,390 11.83 0.0203
2016-01-28 2015-12-31 13F MASCO Com 574599106 43,663 917 2.15 1,243 18.04 0.0186
2015-11-12 2015-09-30 13F MASCO Com 574599106 42,746 7,392 20.91 1,053 12.62 0.0160
2015-08-06 2015-06-30 13F MASCO Com 574599106 35,354 0 0.00 935 -0.11 0.0130
2015-05-11 2015-03-31 13F MASCO COM 574599106 35,354 0 0.00 936 4.35 0.0116
2015-02-09 2014-12-31 13F MASCO COM 574599106 35,354 -7,278 -17.07 897 -10.03 0.0116
2014-11-05 2014-09-30 13F MASCO COM 574599106 42,632 0 0.00 997 5.39 0.0138
2014-08-12 2014-06-30 13F MASCO COM 574599106 42,632 0 0.00 946 0.64 0.0141
2014-05-05 2014-03-31 13F MASCO COM 574599106 42,632 0 0.00 940 -1.98 0.0148
2014-02-05 2013-12-31 13F/A-1 MASCO COM 574599106 42,632 -9,379 -18.03 959 -12.74 0.0149
2014-01-29 2013-12-31 13F MASCO COM 574599106 42,632 959
2014-02-05 2013-09-30 13F/A-1 MASCO Com 574599106 52,011 -7,186 -12.14 1,099 -7.02 0.0165
2013-11-06 2013-09-30 13F MASCO Com 574599106 52,011 1,099
2014-02-12 2013-06-30 13F/A-1 MASCO Com 574599106 59,197 59,197 1,182 0.0192
2013-08-05 2013-06-30 13F MASCO Com 574599106 59,197 1,182
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.